internal void Connect(
bool slaveOk
)
{
if (state != MongoServerState.Disconnected)
{
var message = string.Format("MongoServerInstance.Connect called when state is: {0}", state);
throw new InvalidOperationException(message);
}
State = MongoServerState.Connecting;
connectException = null;
try {
endPoint = address.ToIPEndPoint(server.Settings.AddressFamily);
var connectionPool = new MongoConnectionPool(this);
try {
var connection = connectionPool.AcquireConnection(null);
try {
try {
var isMasterCommand = new CommandDocument("ismaster", 1);
isMasterResult = connection.RunCommand("admin.$cmd", QueryFlags.SlaveOk, isMasterCommand);
} catch (MongoCommandException ex) {
isMasterResult = ex.CommandResult;
throw;
}
isPrimary = isMasterResult.Response["ismaster", false].ToBoolean();
isSecondary = isMasterResult.Response["secondary", false].ToBoolean();
isPassive = isMasterResult.Response["passive", false].ToBoolean();
isArbiter = isMasterResult.Response["arbiterOnly", false].ToBoolean();
if (!isPrimary && !slaveOk)
{
throw new MongoConnectionException("Server is not a primary and SlaveOk is false");
}
maxDocumentSize = isMasterResult.Response["maxBsonObjectSize", MongoDefaults.MaxDocumentSize].ToInt32();
maxMessageLength = Math.Max(MongoDefaults.MaxMessageLength, maxDocumentSize + 1024); // derived from maxDocumentSize
} finally {
connectionPool.ReleaseConnection(connection);
}
} catch {
connectionPool.Close();
throw;
}
State = MongoServerState.Connected;
this.connectionPool = connectionPool;
} catch (Exception ex) {
State = MongoServerState.Disconnected;
connectException = ex;
throw;
}
}
// public methods
/// <summary>
/// Gets the IP end point of this server instance.
/// </summary>
/// <returns>The IP end point of this server instance.</returns>
public IPEndPoint GetIPEndPoint()
{
// use a lock free algorithm because DNS lookups are rare and concurrent lookups are tolerable
// the intermediate variable is important to avoid race conditions
var ipEndPoint = _ipEndPoint;
if (ipEndPoint == null)
{
ipEndPoint = _address.ToIPEndPoint(_server.Settings.AddressFamily);
_ipEndPoint = ipEndPoint;
}
return(ipEndPoint);
}
internal void Connect(bool slaveOk)
{
// Console.WriteLine("MongoServerInstance[{0}]: Connect(slaveOk={1}) called.", sequentialId, slaveOk);
lock (serverInstanceLock)
{
// note: don't check that state is Disconnected here
// when reconnecting to a replica set state can transition from Connected -> Connecting -> Connected
SetState(MongoServerState.Connecting);
connectException = null;
try
{
endPoint = address.ToIPEndPoint(server.Settings.AddressFamily);
try
{
var connection = connectionPool.AcquireConnection(null);
try
{
VerifyState(connection);
if (!isPrimary && !slaveOk)
{
throw new MongoConnectionException("Server is not a primary and SlaveOk is false.");
}
}
finally
{
connectionPool.ReleaseConnection(connection);
}
}
catch
{
connectionPool.Clear();
throw;
}
SetState(MongoServerState.Connected);
}
catch (Exception ex)
{
SetState(MongoServerState.Disconnected);
connectException = ex;
throw;
}
}
}